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Forces

QuestionAnswer
What is force A force is anything that causes an object to accelerate
Explain the term Accelerate Accelerate = a change in velocity
what different type of effects can force have on objects Changing its shape Changing its size Changing its velocity
What is forced measured in Force is measured in newtons The symbol for newtons is N
What instrument is used to measure force Force is measured using a newton meter
What are Newtons 3 Laws of Motion An object at rest will stay at rest and an object in motion will stay in motion unless acted on by an unbalanced force Force = mass x acceleration For every action there is an equal and opposite reaction
What is friction Friction is a force that opposes motion
what are the advantages of friction Car brakes use the force of friction to stop the car Friction between car tyres and the road allow the car to move Without friction we wouldn’t be able to pick things up e.g. pens
What are the disadvantages of friction Slows things down e.g. ships travel much slower than planes Wastes energy e.g. car engine must burn lots of fuel to maintain car speed Causes wear e.g. car threads or soles of shoes
What are ways to reduce friction Lubrication: applying oil or grease to reduce friction Synovial fluid acts as a lubricant in our joints Streamlining: shape of object cuts through friction in air
What is weight The weight of an object is a measure of the force of gravity on it
How do you calculate weight Weight is an example of a force Therefore, if we are calculating weight, we are really calculating the force Force causes mass to accelerate Force = mass x acceleration (Newton’s second law of motion) Weight of an object on Earth = mass (kg) x 10 (accele
Created by: JMahango
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